a + b )3 = a3 + 3 a2b + 3 ab2 + b3
= a3 + b3 + 3 ab (a + b)
( a - b )3 = a3 - 3 a2b + 3 ab2 - b3
a3 + b3 = ( a + b ) ( a2 – ab + b2)
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a + b )3 = a3 + 3 a2b + 3 ab2 + b3
= a3 + b3 + 3 ab (a + b)
( a - b )3 = a3 - 3 a2b + 3 ab2 - b3
a3 + b3 = ( a + b ) ( a2 – ab + b2)